Dot.
8-year-old Dot is a ball of energy who launches herself into adventures and fearlessly sets about solving problems (which she most likely created herself) in the same way any 8-year-old would... by messing up a lot and laughing even more.
44. Best Friend Showdown
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Dot finds herself stuck in the middle of a best friend showdown between Hal and Ruby, each of whom claim to be Dot's true BFF.